Function EvalChecksig

src/script/interpreter.cpp:402–415

Helper for OP_CHECKSIG, OP_CHECKSIGVERIFY, and (in Tapscript) OP_CHECKSIGADD. * * A return value of false means the script fails entirely. When true is returned, the * success variable indicates whether the signature check itself succeeded. */

 * success variable indicates whether the signature check itself succeeded.
 */
static bool EvalChecksig(const valtype& sig, const valtype& pubkey, CScript::const_iterator pbegincodehash, CScript::const_iterator pend, ScriptExecutionData& execdata, script_verify_flags flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* serror, bool& success)
{
    switch (sigversion) {
    case SigVersion::BASE:
    case SigVersion::WITNESS_V0:
        return EvalChecksigPreTapscript(sig, pubkey, pbegincodehash, pend, flags, checker, sigversion, serror, success);
    case SigVersion::TAPSCRIPT:
        return EvalChecksigTapscript(sig, pubkey, execdata, flags, checker, sigversion, serror, success);
    case SigVersion::TAPROOT:
        // Key path spending in Taproot has no script, so this is unreachable.
        break;
    }
    assert(false);
}

bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, script_verify_flags flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* serror)
{